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<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <link rel="stylesheet" href="{{env('SOURCE_PATH')}}css/v3_base.css">
    <link rel="stylesheet" href="{{env('SOURCE_PATH')}}css/v3_style.css">
    <link rel="stylesheet" href="/css/v1.base.css">
    <meta name="csrf-token" content="{{ csrf_token() }}">
</head>
<body>

<div class="topbar">
            <div class="wapper">
                <div class="topbar_left f_l">
                   <span><a href="/login">登录</a>/</span>
                   <span><a href="/regist">注册</a></span>
                </div>
                <div class="topbar_right f_r">
                    {{-- <img src="/images/tu1_02.jpg" alt=""> --}}
                    <img src="/images/tu1_04.jpg" alt="">
                </div>
            </div>
        </div>
        <div class="nav">
            <div class="wapper">
                <a href="/"><img src="/images/logo_03.jpg" alt="" style="display: inline-block;"></a>
                <div class="nav_right f_r">
                    <ul class="ul">
                        <li {{(isset($selectedMenu) && $selectedMenu == 'index')?'class=active':''}} >
                            <a href="/">首页</a>
                        </li>
                        <li {{(isset($selectedMenu) && $selectedMenu == 'about')?'class=active':''}}>
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                        </li>
                        <li>
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                        </li>
                        <li {{(isset($selectedMenu) && $selectedMenu == 'product_center')?'class=active':''}}>
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